Details

Autor(en) / Beteiligte

• Agnello, M.
• Agrawal, N.
• Ahn, S. A.
• Andrei, C.
• Antonioli, P.
• Arnaldi, R.
• Batzing, P. C.
• Blanco, F.
• Bøggild, H.
• Book, J.
• Botje, M.
• Braun-Munzinger, P.
• Budnikov, D.
• Buncic, P.
• Caines, H.
• Carena, F.
• Cepila, J.
• Chibante Barroso, V.
• Chojnacki, M.
• Cuautle, E.
• Dainese, A.
• Das, D.
• Di Nezza, P.
• Erazmus, B.
• Esposito, M.
• Ferreiro, E. G.
• Foertsch, S.
• Furget, C.
• Gerhard, J.
• Ghidini, B.
• Gorbunov, S.
• Grigoras, C.
• Grosse-Oetringhaus, J. F.
• Hristov, P.
• Ilkiv, I.
• Inaba, M.
• Ivanov, V.
• Janik, M. A.
• Jayarathna, P. H. S. Y.
• Klein-Bösing, C.
• Krivda, M.
• Lemmon, R. C.
• Lippmann, C.
• Loginov, V.
• Luettig, P.
• Luparello, G.
• Maevskaya, A.
• Mahmood, S. M.
• Mal'Kevich, D.
• Marchisone, M.
• Mas, A.
• Masciocchi, S.
• Mastroserio, A.
• Mayer, C.
• Mohammadi, N.
• Montaño Zetina, L.
• Nedosekin, A.
• Oeschler, H.
• Oliveira Da Silva, A. C.
• Oppedisano, C.
• Ozdemir, M.
• Papikyan, V.
• Peitzmann, T.
• Peskov, V.
• Piano, S.
• Poghosyan, M. G.
• Porteboeuf-Houssais, S.
• Prasad, S. K.
• Rakotozafindrabe, A.
• Raniwala, S.
• Räsänen, S. S.
• Real, J. S.
• Rettig, F.
• Romita, R.
• Rui, R.
• Russo, R.
• Ryabinkin, E.
• Sakai, S.
• Sanchez Castro, X.
• Šándor, L.
• Sano, M.
• Scarlassara, F.
• Schulc, M.
• Sevcenco, A.
• Shangaraev, A.
• Singh, R.
• Sugitate, T.
• Suire, C.
• Suleymanov, M.
• Tveter, T. S.
• Uras, A.
• Vajzer, M.
• Vickovic, L.
• Viinikainen, J.
• Vranic, D.
• Wessels, J. P.
• Wilkinson, J.
• Yano, S.
• Zgura, I. S.
• Zhou, F.

Titel

Multiparticle azimuthal correlations in p -Pb and Pb-Pb collisions at the CERN Large Hadron Collider

Ist Teil von

• Physical review. C, Nuclear physics, 2014-11, Vol.90 (5), Article 054901

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2014

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• Our measurements of multiparticle azimuthal correlations (cumulants) for charged particles in p-Pb at √sNN=5.02 TeV and Pb-Pb at √sNN=2.76 TeV collisions are presented. They help address the question of whether there is evidence for global, flowlike, azimuthal correlations in the p-Pb system. These comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in p-Pb collisions. However, when a |Δη| gap is placed to suppress such correlations, the two-particle cumulants begin to rise at high multiplicity, indicating the presence of global azimuthal correlations. The Pb-Pb values are higher than the p-Pb values at similar multiplicities. In both systems, the second harmonic four-particle cumulants exhibit a transition from positive to negative values when the multiplicity increases. Furthermore, the negative values allow for a measurement of v2{4} to be made, which is found to be higher in Pb-Pb collisions at similar multiplicities. The second harmonic six-particle cumulants are also found to be higher in Pb-Pb collisions. In Pb-Pb collisions, we generally find v2{4}≃v2{6}≠0 which is indicative of a Bessel-Gaussian function for the v2 distribution. For very high-multiplicity Pb-Pb collisions, we observe that the four- and six-particle cumulants become consistent with 0. Finally, third harmonic two-particle cumulants in p-Pb and Pb-Pb are measured. These are found to be similar for overlapping multiplicities, when a |Δη|>1.4 gap is placed.